1.4-units-spring to distribute stress 2.Aluminum case with long-life 3.Polyurethane protecting cover 4. Less fuel consumption Tamping Rammer (with CE Certification)4-units-spring, dispersed distribution of stress.Aluminum alloy casting gearbox.Polyurethane protecting cover feature in resilient, resistant to corrosion and aging.Reinforced composite compaction foot , shockproof.Advanced shock ...